George III Silver Pocket Watch by James McCabe, London

George III silver consular cased pocket watch, by Jas. McCabe,…
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George III silver consular cased pocket watch, by Jas. McCabe, Royal Exchange, London, number 10451 51 mm case, hallmarked London 1811, by John Dyer. fusee movement with duplex escapement, signed and numbered to the gilded dust cover, back plate and dial. Bullseye glass, white enamel dial, Roman numerals, minute indices, subs seconds at VI, gold hands. Edge hairline at V - VI. James McCabe originally from Ireland relocated to London in the late 18th century He was well known for his fine watches and clocks with many of them being exported to India. His four sons carried on the business after his death in 1811. In his last year he was made Warden of the Worshipful Company of Clockmakers. During the 19th century the family were to become one of the most famous clockmaking families of this period. They were particularly skilled at making exceptional carriage clocks.

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  • George Iii - George III (1738 - 1820) was King of Great Britain and Ireland from 1760 to 1820.
  • Gilding - Gilding is a method of ornamentation whereby a thin sheet of gold metal is applied to items made of wood, leather, ceramics, glass and silver for decorative purposes.

    For furniture including mirrors, the sheet of gold is usually applied over a coating of gesso. Gesso is a mixture of plaster of Paris and gypsum mixed with water and then applied to the carved wooden frames of mirrors and picture frames as a base for applying the gold leaf. After numerous coats of gesso have been applied, allowed to dry and then sanded a coat of "bole", a usually red coloured mixture of clay and glue is brushed on and allowed to dry, after which the gold leaf is applied. Over time parts of the gilding will rub off so the base colour can be seen. In water gilding, this was generally a blue colour, while in oil gilding, the under layer was often yellow. In Victorian times, gilders frequently used red as a pigment beneath the gold leaf.

    Metal was often gilded by a process known as fire gilding. Gold mixed with mercury was applied and heated, causing the mercury to evaporate, the long-term effect of which was to kill or disable the craftsman or woman from mercury poisoning. The pursuit of beauty has claimed many victims, not the least of which were the artists who made those pieces so highly sought after today.
  • Back Plate - On many types of clocks, the movement operates between two plates, usually made of brass, one at the back, and the other at the front, which forms a mount for the dial.

    On English bracket, mantle and table clocks the backplate was often visible through a glass door or panel from the late 17th century, and could be profusely engraved with scrolling decorations, flowers, foliage, birds, and figures. The engraving could also include the maker?s name.

    The amount of engraving reduced and became simpler as the 18th century progressed, and by 1800, had been reduced to a border, often with the maker's name in the centre. By the early 1800s all decoration had ceased, and only the maker's name was added, and by the Victorian era, most bracket, mantle and table clocks had no engraving.
  • Duplex Escapement - A duplex escapement is used in clocks and watches to control the release of energy from the mainspring to the timekeeping mechanism. The duplex escapement is a variation of the lever escapement and is characterized by the use of two pallets, or escape wheels, to control the release of energy.

    In a duplex escapement, the balance wheel, which oscillates back and forth, alternately pushes against the two pallets. This allows the energy stored in the mainspring to be transferred to the balance wheel in a controlled manner, keeping the timekeeping mechanism accurate.

    One of the advantages of the duplex escapement is its relatively low friction, which helps to maintain accurate timekeeping and prolong the life of the clock or watch. Additionally, the duplex escapement is relatively easy to maintain and repair, making it a popular choice for clockmakers.
  • Fusee - The fusee movement was used in clocks and pocket watches from the mid 17th century. The fusee is a cone shaped drum within the works that is linked to the barrel of the spring, usually by a length of chain.

    As the mainspring loses its tension over time, the cone shaped barrel compensates for this by increasing the tension, by pulling the mainspring tighter, thus ensuring the time remains constant.

    Use of the fusee in clocks was superseded by the "going barrel" in the mid 19th century and for pocket watches at the beginning of the 19th century.

    The fusee continued to be used in marine chronometers until the 1970s.
  • Movement - The technical name for the workings of a clock or watch, and does not include the dial or case.

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